Patient transfer device

Abstract

The invention relates to a patient transfer device which comprises a transfer frame and four universal wheels for the transfer frame to move. The transfer frame comprises a frame body, two first sliding grooves formed in one side of the frame body, two second sliding grooves formed in the other side of the frame body, two first sliding rods arranged on the two first sliding grooves, two second sliding rods arranged on the two second sliding grooves, a frame arranged on the two first sliding rods and the two second sliding rods, and two supporting assemblies arranged on the frame. The auxiliary assemblies are arranged on the two first sliding rods and the two second sliding rods, the driving assembly is used for driving the two first sliding rods and the two second sliding rods to move synchronously, the two first through holes are formed in the two first sliding rods correspondingly, and the two second through holes are formed in the two second sliding rods correspondingly; one ends of the two first guide rods are fixedly arranged on the frame body, and the other ends of the two first guide rods are respectively arranged in the two first through holes in a sliding manner; and one ends of the two second guide rods are fixedly arranged on the frame body, and the other ends of the two second guide rods are respectively arranged in the two second through holes in a sliding manner.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a patient transport device. Background Art

[0002] Every day, many patients in the hospital's radiology department need to undergo MRI examinations. MRI is an imaging technology that reconstructs images by collecting signals generated by the magnetic resonance phenomenon. Its basic principle is that the hydrogen atoms contained in the human body will resonate when given a specific high wave under a strong magnetic field, generating a high-wave number electromagnetic wave. MRI uses this property and uses electronic computers to collect, process and graph the changes in the magnetic field. MRI can display fat, internal organs, muscles, fast-flowing blood, bones and air, etc., and can also clearly display the internal structure of the organs.

[0003] For patients who cannot walk independently, nursing staff are required to push the bed to the MRI machine, and then multiple people are required to manually move the patient on the bed to the MRI machine for follow-up examinations. After the examination, the patient needs to be moved back to the bed. The transportation process greatly increases the labor intensity of nursing staff and is prone to secondary injuries to patients. Some patients need to remain in a side-lying position, which increases the difficulty of carrying the patients. Summary of the invention

[0004] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] In order to solve the technical problems mentioned in the above background technology part, some embodiments of the present application provide a patient transfer device, including a transfer frame and four universal wheels for moving the transfer frame, wherein the transfer frame includes a frame, two first slide grooves arranged on one side of the frame and two second slide grooves on the other side, two first sliding rods slidably arranged on the two first slide grooves, two second sliding rods slidably arranged on the two second slide grooves, a frame fixed on the two first sliding rods and the two second sliding rods at the same time, two supporting components symmetrically arranged on the frame, an auxiliary component located below the two supporting components and arranged on the two first sliding rods and the two second sliding rods, a driving component arranged on the frame and used to drive the two first sliding rods and the two second sliding rods to move synchronously, two first through holes respectively arranged on the two first sliding rods, two second through holes respectively arranged on the two second sliding rods, two first guide rods one end of which is fixed on the frame and the other end of which is slidably arranged in the two first through holes, and two second guide rods one end of which is fixed on the frame and the other end of which is slidably arranged in the two second through holes.

[0006] Specifically, the lifting assembly includes a first translation rod and a second translation rod that penetrate and slide on the frame, a first base plate fixed at one end of the first translation rod, a second base plate fixed at one end of the second translation rod, a winding mechanism provided on the first base plate and the second base plate, a first fixed block fixed at the other end of the first translation rod, a second fixed block fixed at the other end of the second translation rod, a first spring that is sleeved on the first translation rod and one end of which is fixed on the first fixed block, and a second spring that is fixedly sleeved on the second translation rod and one end of which is fixed on the second fixed block.

[0007] Specifically, the first spring and the second spring have the same elastic force and the same length.

[0008] Specifically, the winding mechanism includes a first turntable rotatably arranged on a first substrate, a second turntable coaxial with the first turntable and rotatably arranged on the second substrate, a reduction motor fixedly arranged on the first substrate and used to drive the first turntable to rotate, a first fixed shaft perpendicular to the axis line of the first turntable and fixed thereon, a second fixed shaft perpendicular to the axis line of the second turntable and fixed thereon, a first clamping plate and a second clamping plate respectively slidably mounted on the first fixed shaft and the second fixed shaft at both ends; the axis line of the first fixed shaft and the axis line of the first turntable are simultaneously cross-arranged, and the first fixed shaft and the second fixed shaft are symmetrically arranged.

[0009] Specifically, the winding mechanism also includes a third spring sleeved on the first fixed shaft and with its two ends respectively fixed on the first clamping plate and the second clamping plate, and a fourth spring sleeved on the second fixed shaft and with its two ends respectively fixed on the first clamping plate and the second clamping plate.

[0010] Specifically, the auxiliary component includes a first belt shaft with two ends rotatably arranged on two first sliding rods, a second belt shaft symmetrically arranged with the first belt shaft and with two ends rotatably arranged on two second sliding rods, a safety belt wound around the first belt shaft and the second belt shaft, a self-locking motor fixed on one of the first sliding rods and used to drive the first belt shaft to rotate, and a first give-way opening and a second give-way opening arranged on the safety belt; the first give-way opening and the second give-way opening are initially arranged to overlap.

[0011] Specifically, the driving assembly includes a first connecting rod whose two ends are respectively fixed on two first sliding rods, a second connecting rod that is symmetrical to the first connecting rod and whose two ends are respectively fixed on two second sliding rods, a first electric telescopic rod whose two ends are respectively fixed on the first connecting rod and the frame, and a second electric telescopic rod whose two ends are respectively fixed on the second connecting rod and the frame.

[0012] The beneficial effects of the present invention are:

[0013] The driving assembly drives the two first sliding bars and the two second sliding bars to descend synchronously, so that the frame descends synchronously, and the two lifting assemblies on the frame descend. During the descending process of the two first sliding bars and the two second sliding bars, the auxiliary assembly is also driven to descend. When the auxiliary assembly descends to be flush with the mattress, the driving assembly stops running, and the auxiliary assembly can make way for the patient on the hospital bed, that is, the auxiliary assembly is hollow in the middle, and then the two ends of the mattress are respectively passed through the middle of the auxiliary assembly, and the two ends of the mattress on the hospital bed are clamped and rolled up by the two lifting assemblies. During the rolling process, the mattress is gradually tightened, so that the mattress and the patient thereon move and finally leave the hospital bed. The overall operation is simple and fast, saving time and effort, and greatly reducing the labor intensity of medical staff; starting the auxiliary assembly plays a safety role for the patient, pushing the frame to separate the frame from the hospital bed, and moving the frame to the MRI machine so that the frame can be covered on the outside of the mobile platform on the MRI machine, first driving the auxiliary assembly to reset, and then through The driving component drives the two lifting components to descend so that the mattress and the patient can fall on the moving platform of the MRI machine. The two lifting components relax the clamping of the two ends of the mattress, and the rear driving component drives the two first sliding bars and the two second sliding bars to rise. The patient can be subsequently subjected to an MRI examination. After the examination is completed, the above operation is repeated to put the patient back on the bed. The above operation can also be completed in the ward, and then the transfer device is pushed to move as a whole to the MRI machine and the patient is placed thereon. The lifting component can clamp and roll up the mattress, and a convex portion is formed during the rolling process to limit the position of the patient. The lifting component is provided with two so that the two sides of the patient can be limited to avoid changes in the patient's position during the transfer process and to prevent the patient from falling therefrom. The overall operation is simpler and more convenient. Since the two ends of the mattress are clamped and lifted, the patient on the mattress is less affected, so it is not easy to cause secondary injury to the patient thereon. The lifting component can reduce shock to the patient during the transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0015] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0016] In the attached picture:

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the winding mechanism;

[0019] Figure 3 for Figure 2 A in the enlarged view;

[0020] Figure 4 It is a side schematic diagram of the present invention;

[0021] Figure 5 for Figure 4 The structural cross-sectional view of line AA in FIG.

[0022] Figure 6 for Figure 5 The enlarged view of point B in the figure;

[0023] Figure 7 for Figure 5 Enlarged view of point C in the figure.

[0024] The following are the descriptions of the reference numerals:

[0025] 1. Transfer rack; 2. Universal wheel; 3. Frame; 4. First slide slot; 5. Second slide slot; 6. First slide bar; 7. Second slide bar; 8. Frame; 9. Lifting assembly; 91. First translation rod; 92. Second translation rod; 93. First base plate; 94. Second base plate; 95. Rewinding mechanism; 951. First turntable; 952. Second turntable; 953. Speed ​​reduction motor; 954. First fixed shaft; 955. Second fixed shaft; 956. First clamping plate; 957. Second clamping plate; 958. Third spring; 959. Fourth spring; 9 6. First fixed block; 97. Second fixed block; 98. First spring; 99. Second spring; 10. Auxiliary component; 101. First belt shaft; 102. Second belt shaft; 103. Safety belt; 104. Self-locking motor; 105. First clearance opening; 106. Second clearance opening; 11. Driving component; 111. First connecting rod; 112. Second connecting rod; 113. First electric telescopic rod; 114. Second electric telescopic rod; 12. First through hole; 13. Second through hole; 14. First guide rod; 15. Second guide rod. DETAILED DESCRIPTION

[0026] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0027] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0028] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0029] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0030] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0031] Reference Figure 1-Figure 7As shown, a patient transport device described in the present invention includes a transport frame 1 and four universal wheels 2 for moving the transport frame 1, wherein the transport frame 1 includes a frame body 3, two first slide grooves 4 arranged on one side of the frame body 3 and two second slide grooves 5 on the other side, two first slide bars 6 respectively slidably arranged on the two first slide grooves 4, two second slide bars 7 respectively slidably arranged on the two second slide grooves 5, a frame 8 fixedly arranged on the two first slide bars 6 and the two second slide bars 7 at the same time, two supporting components 9 symmetrically arranged on the frame 8, an auxiliary component 10 located below the two supporting components 9 and arranged on the two first slide bars 6 and the two second slide bars 7, and a support assembly 10 arranged on the frame body 3 and used for driving the two first slide bars 6 and the two second slide bars 7 to move synchronously. A driving assembly 11, two first through holes 12 respectively arranged on the two first sliding rods 6, two second through holes 13 respectively arranged on the two second sliding rods 7, two first guide rods 14 one end of which is fixedly arranged on the frame 3 and the other end of which is respectively slidably arranged in the two first through holes 12, and two second guide rods 15 one end of which is fixedly arranged on the frame 3 and the other end of which is respectively slidably arranged in the two second through holes 13; push the hospital bed and the patient who needs MRI examination on the bed, move the hospital bed to the side of the MRI machine, and transport the patient on the hospital bed to the MRI machine through the transport device. The specific operation is as follows: first, put the transport device as a whole on the outside of the hospital bed, so that the two lifting assemblies 9 are respectively located on both sides above the hospital bed, and drive the driving assembly 1 1 drives the two first slide bars 6 and the two second slide bars 7 to descend synchronously, so that the frame 8 descends synchronously, and the two lifting components 9 on the frame 8 descend. During the descent of the two first slide bars 6 and the two second slide bars 7, the auxiliary component 10 is also driven to descend. When the auxiliary component 10 descends to be flush with the mattress, the driving component 11 stops running, and the auxiliary component 10 can make way for the patient on the bed, that is, the auxiliary component 10 is hollow in the middle, and then the two ends of the mattress are respectively passed through the middle of the auxiliary component 10, and the two ends of the mattress on the bed are clamped and rolled up by the two lifting components 9. During the rolling process, the mattress is gradually tightened, so that the mattress and the patient thereon move and finally leave the bed, and the auxiliary component 10 is started to provide a safe place for the patient. Full protection, push the frame 3 to separate the frame 3 from the bed, and then move the frame 3 to the MRI machine so that the frame 3 can be sleeved on the outside of the mobile platform of the MRI machine. First, drive the auxiliary component 10 to reset, and then drive the two lifting components 9 to descend through the driving component 11, so that the mattress and the patient can fall on the mobile platform of the MRI machine. The two lifting components 9 relax the clamping of the two ends of the mattress, and then the driving component 11 drives the two first slide bars 6 and the two second slide bars 7 to rise. Subsequently, the patient can be subjected to a MRI examination. After the examination is completed, repeat the above operation and put the patient back on the bed; the above operation can also be completed in the ward, and then push the transfer device as a whole to move to the MRI machine and put the patient on it;The lifting component 9 can clamp and roll up the mattress. During the rolling process, a convex portion is formed to limit the position of the patient. The lifting component 9 is provided with two so that the two sides of the patient can be limited to avoid changes in the patient's position during transportation and prevent the patient from falling off it. The overall operation is simpler and more convenient. Since the two ends of the mattress are clamped and lifted, the patient on the mattress has less impact, so it is not easy to cause secondary damage to the patient on the mattress; the two first guide rods 14 are set to guide the two first slide bars 6 respectively, so that when the two first slide bars 6 are located on the two first slide grooves 4 and move, the overall wear is small, thereby increasing the service life of the two slide bars and making the two slide bars have better straightness during movement. The two second guide rods 15 are set to have the same effect as the first guide rods 14. ;

[0032] Specifically, the lifting assembly 9 includes a first translation rod 91 and a second translation rod 92 that penetrate and slide on the frame 8, a first base plate 93 fixed at one end of the first translation rod 91, a second base plate 94 fixed at one end of the second translation rod 92, a winding mechanism 95 provided on the first base plate 93 and the second base plate 94, a first fixed block 96 fixed at the other end of the first translation rod 91, a second fixed block 97 fixed at the other end of the second translation rod 92, a first spring 98 sleeved on the first translation rod 91 and one end of which is fixed on the first fixed block 96, and a second spring 99 fixedly sleeved on the second translation rod 92 and one end of which is fixed on the second fixed block 97; the first spring 98 and the The elastic force of the second spring 99 is consistent, and the lengths of the two are consistent; the winding mechanism 95 includes a first turntable 951 rotatably arranged on the first substrate 93, a second turntable 952 coaxial with the first turntable 951 and rotatably arranged on the second substrate 94, a reduction motor 953 fixed on the first substrate 93 and used to drive the first turntable 951 to rotate, a first fixed shaft 954 perpendicular to the axis of the first turntable 951 and fixed thereon, a second fixed shaft 955 perpendicular to the axis of the second turntable 952 and fixed thereon, a first clamping plate 956 and a second clamping plate 957 slidably sleeved on the first fixed shaft 954 and the second fixed shaft 955 at both ends; the axis of the first fixed shaft 954 is perpendicular to the axis of the second turntable 952 and fixed thereon The first fixed axis 954 and the second fixed axis 955 are arranged crosswise with the axis center line of the first rotating disk 951, and the first fixed axis 954 and the second fixed axis 955 are arranged symmetrically; one end of the mattress passes through the first clamping plate 956 and the second clamping plate 957, and the reduction motor 953 is started. The reduction motor 953 is purchased on the market, and the reduction motor 953 drives the first rotating disk 951 to rotate, so that the first fixed axis 954 and the first clamping plate 956 and the second clamping plate 957 on the first rotating disk 951 rotate together, and the second rotating disk 952 and the second fixed axis 955 thereon rotate slavely. During the rotation of the first clamping plate 956 and the second clamping plate 957, the mattress can be rolled up, and the clamping work of the mattress is automatically completed. During the rolling process, the first clamping plate 956 and the second clamping plate 95 7 is subjected to a large squeezing force, and the clamping force of the mattress is increased, and the mattress can be prevented from being separated from the first clamping plate 956 and the second clamping plate 957 by rolling up the mattress; during the rolling up of the mattress, the mattress is gradually tightened, and at the same time, the first translation rod 91 and the second translation rod 92 move first, and when the other ends of the first spring 98 and the second spring 99 collide with the frame 8, the mattress is tightened to make the mattress and the patient leave the bed together, and the first spring 98 and the second spring 99 are arranged to play a shock-absorbing role during the patient transfer process, and at the same time, the elastic force of the first spring 98 and the second spring 99 are consistent, and the lengths of the two are consistent, so that the patient can be lifted up and located in the middle of the transfer device, and the load-bearing point is in the center during operation, and the transfer device is stable.

[0033] Specifically, the rolling mechanism 95 also includes a third spring 958 which is sleeved on the first fixed shaft 954 and whose two ends are respectively fixed on the first clamping plate 956 and the second clamping plate 957, and a fourth spring 959 which is fixedly sleeved on the second fixed shaft 955 and whose two ends are respectively fixed on the first clamping plate 956 and the second clamping plate 957; by setting the third spring 958 and the fourth spring 959, the first clamping plate 956 and the second clamping plate 957 can be set separately at their initial positions to facilitate the passage of the mattress. When the mattress is rolled up, the first clamping plate 956 and the second clamping plate 957 are subjected to a force that moves closer to each other, causing the third spring 958 and the fourth spring 959 to contract.

[0034] Specifically, the auxiliary component 10 includes a first belt shaft 101 whose two ends are rotatably arranged on the two first sliding bars 6, a second belt shaft 102 which is symmetrically arranged with the first belt shaft 101 and whose two ends are rotatably arranged on the two second sliding bars 7, a safety belt 103 which is wound around the first belt shaft 101 and the second belt shaft 102, a self-locking motor 104 which is fixed on one of the first sliding bars 6 and is used to drive the first belt shaft 101 to rotate, and a first yielding opening 105 and a second yielding opening 106 which are arranged on the safety belt 103; the first yielding opening 105 and the second yielding opening 106 are initially arranged to overlap each other, so as to play a role in The mattress and the patient thereon give way, and the mattress and the patient thereon can pass through the first giving way opening 105 and the second giving way opening 106 during the upward movement. After the patient is lifted up, the self-locking motor 104 is started. The self-locking motor 104 is purchased on the market. The self-locking motor 104 drives the first belt shaft 101 to rotate, so that the safety belt 103 runs, and the second belt shaft 102 rotates slavely, so that the first giving way opening 105 and the second giving way opening 106 are misaligned, and at the same time, the first giving way opening 105 and the second giving way opening 106 are moved away from under the mattress, and the patient above is protected by the safety belt 103.

[0035] Specifically, the driving assembly 11 includes a first connecting rod 111 whose two ends are respectively fixed on the two first sliding rods 6, a second connecting rod 112 which is symmetrical to the first connecting rod 111 and whose two ends are respectively fixed on the two second sliding rods 7, a first electric telescopic rod 113 whose two ends are respectively fixed on the first connecting rod 111 and the frame 3, and a second electric telescopic rod 114 whose two ends are respectively fixed on the second connecting rod 112 and the frame 3; the first electric telescopic rod 113 and the second electric telescopic rod 114 are started at the same time to make the first connecting rod 111 and the second connecting rod 112 rise and fall synchronously, the two ends of the first connecting rod 111 are respectively fixed on the two first sliding rods 6, and the two ends of the second connecting rod 112 are respectively fixed on the two second sliding rods 7, so that the two first sliding rods 6 and the two second sliding rods 7 can be driven to move at the same time.

[0036] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A patient transport device, comprising a transport frame (1) and four universal wheels (2) for the transport frame (1) to move, characterized in that: The transfer rack (1) comprises a rack body (3), two first slide grooves (4) arranged on one side of the rack body (3) and two second slide grooves (5) on the other side, two first slide bars (6) respectively slidably arranged on the two first slide grooves (4), two second slide bars (7) respectively slidably arranged on the two second slide grooves (5), a frame (8) fixedly arranged on the two first slide bars (6) and the two second slide bars (7), two supporting components (9) symmetrically arranged on the frame (8), and auxiliary components (9) located below the two supporting components (9) and arranged on the two first slide bars (6) and the two second slide bars (7). The invention relates to a component (10), a driving component (11) provided on the frame (3) and used for driving the two first slide bars (6) and the two second slide bars (7) to move synchronously, two first through holes (12) respectively provided on the two first slide bars (6), two second through holes (13) respectively provided on the two second slide bars (7), two first guide rods (14) one end of which is fixedly provided on the frame (3) and the other end of which is respectively slidably provided in the two first through holes (12), and two second guide rods (15) one end of which is fixedly provided on the frame (3) and the other end of which is respectively slidably provided in the two second through holes (13).

2. A patient transport device according to claim 1, characterized in that: The lifting assembly (9) comprises a first translation rod (91) and a second translation rod (92) penetrating and slidably arranged on the frame (8), a first base plate (93) fixedly arranged at one end of the first translation rod (91), a second base plate (94) fixedly arranged at one end of the second translation rod (92), a winding mechanism (95) arranged on the first base plate (93) and the second base plate (94), a first fixed block (96) fixedly arranged at the other end of the first translation rod (91), a second fixed block (97) fixedly arranged at the other end of the second translation rod (92), a first spring (98) sleeved on the first translation rod (91) and having one end fixedly arranged on the first fixed block (96), and a second spring (99) fixedly sleeved on the second translation rod (92) and having one end fixedly arranged on the second fixed block (97).

3. A patient transport device according to claim 2, characterized in that: The first spring (98) and the second spring (99) have the same elastic force and the same length.

4. A patient transport device according to claim 2, characterized in that: The winding mechanism (95) comprises a first rotating disk (951) rotatably arranged on a first substrate (93), a second rotating disk (952) coaxially arranged with the first rotating disk (951) and rotatably arranged on a second substrate (94), a reduction motor (953) fixedly arranged on the first substrate (93) and used for driving the first rotating disk (951) to rotate, a first fixed shaft (954) arranged perpendicularly to the axis of the first rotating disk (951) and fixedly arranged thereon, a second fixed shaft (955) arranged perpendicularly to the axis of the second rotating disk (952) and fixedly arranged thereon, a first clamping plate (956) and a second clamping plate (957) with two ends respectively slidably sleeved on the first fixed shaft (954) and the second fixed shaft (955); the axis of the first fixed shaft (954) and the axis of the first rotating disk (951) are arranged to intersect at the same time, and the first fixed shaft (954) and the second fixed shaft (955) are arranged symmetrically.

5. A patient transport device according to claim 4, characterized in that: The winding mechanism (95) further comprises a third spring (958) sleeved on the first fixed shaft (954) and having its two ends respectively fixed on the first clamping plate (956) and the second clamping plate (957), and a fourth spring (959) sleeved on the second fixed shaft (955) and having its two ends respectively fixed on the first clamping plate (956) and the second clamping plate (957).

6. A patient transport device according to claim 1, characterized in that: The auxiliary component (10) comprises a first belt shaft (101) whose two ends are rotatably arranged on two first sliding bars (6), a second belt shaft (102) which is symmetrically arranged with the first belt shaft (101) and whose two ends are rotatably arranged on two second sliding bars (7), a safety belt (103) which is wound around the first belt shaft (101) and the second belt shaft (102), a self-locking motor (104) which is fixed on one of the first sliding bars (6) and is used to drive the first belt shaft (101) to rotate, and a first yielding opening (105) and a second yielding opening (106) which are arranged on the safety belt (103); the first yielding opening (105) and the second yielding opening (106) are initially arranged to overlap.

7. A patient transport device according to claim 1, characterized in that: The driving assembly (11) comprises a first connecting rod (111) whose two ends are respectively fixed on two first sliding rods (6), a second connecting rod (112) which is symmetrical to the first connecting rod (111) and whose two ends are respectively fixed on two second sliding rods (7), a first electric telescopic rod (113) whose two ends are respectively fixed on the first connecting rod (111) and the frame (3), and a second electric telescopic rod (114) whose two ends are respectively fixed on the second connecting rod (112) and the frame (3).

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